noun
prenatal period; time in the womb
Refers to the period before birth, often used in contexts like prenatal education or development. Literally 'minus one year old'.
胎教はマイナス1歳からの教育と言われる。
Prenatal education is said to be education from minus one year old.
マイナス1歳の時期に、赤ちゃんはお腹の中で多くのことを学ぶ。
During the prenatal period, babies learn many things in the womb.
Compound of マイナス (minus) and 1歳 (one year old), literally 'minus one year old'. A modern coinage used in parenting and educational contexts.